Floor-boring machine



Patented Mar. I4, |899.

No. 62I,250.

F. B. HOOKER. FLOOR BORING MACHINE.

(Application led Aug. 17, 1895.)

2 Sheets-Sheet I.

(No Model.)

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No. 62|,250. Patented Mar. I4, |899.

F. B. HOOKER. FLOOR BORING MACHINE. (Application filed Aug. 17, 1895.)(No Model.)

2 Sheets-Sheet 2.

'w/TNESSES.-

Mmm/ro@ fa/wf www. a 1. /g bww/'f 5y Nrrnn STATES FRANK B. HOOKER, OFST. JOHNSBURY, VERMONT.

FLOOR-BORING MACHINE.`

SPECIFICATION forming part of Letters Patent No. 621,250, dated March14, 1899.

Application filed August 17, 1895. Serial No. 559,649. (No model.)

To all whom, it may concern:

Be it known that I, FRANK B. HOOKER, a citizen of the United States,residing at St. Johnsbury, in the county of Caledonia and State ofVermont, have invented a new and useful Floor-Boring Machine, of whichthe following is a specification.

My invention relates to improvement-s in Hoor-boring machines in which averticallyreciprocating boring-tool attached to an oscillating frameoperates in conjunction with aV planing or matching machine for planingand matching flooring. I attain this object by the mechanism illustratedin the accompanying drawings, in which- Figure 1 is vertical side View.Fig. 2 is vertical front view, and Fig. 3 shows the machine attached toa planer or matching-machine.

Referring to the drawings,the numeral 12 indicates a rigid. frameprovided with a bracket 23, having. suitable apertures by means of whichit may be securely attached by means of screws or bolts to the bed of aplaninglnachine (partly shown in dotted lines in Fig. 3) upon which theWork is to be done.

The numeral 11 indicates a swinging or oscillating frame which ispi-voted to the frame 12 by a bolt 4, upon which it is permitted toswing, as indicated by dotted lines in Fig. 2 of the drawings.

The numeral 2 indicates a mandrel which is j ournaled in bearings 5 and17 in the frame 11 and is capable of a vertical reciprocatory movementin its bearings. The upper part of the mandrel is provided with a drum1, which receives a rotary motion from a belt 27, passing overguide-pulleys 28, the belt receiving its motion from a lpulley attachedto the running-gear of the planer or matching machine, or motion may becommunicated to the mandrel from an independent countershaft. A screw orWorm 16 is keyed or feathered on the mandrel in such a manner that itwill rotate with the mandrel when the same is revolved, but will permitthe mandrel to have its vertical movement through it. Intermeshing withthe Worm is a gear-Wheel 15, keyed on a shaft 14, which also has keyedupon it two cams 13, which bear against anti- 'friction-rollers 25,mounted in the end of arms 10, the upper ends of which are split, asinframe with it.

dicated at 2G, and adjustably clamped to a shaft 9, journaled insuitable bearings made in the frame 11, as shown in Fig. 2. Said shafthas keyed to it two levers 8, which are slotted at their free ends andembrace a collar 7, mounted upon the mandrel and provided with trunnions24, which set in the slots of the levers. The collar is so mounted uponthe mandrel that the latter may revolve freely therein, but will bereeiprocated by said collar, as hereinafter more fully explained. Themandrel is held normally up by means of a spiral spring 3, its movementbeing limited by means of a collar 6 and the bearing 5, heretoforementioned. Mounted on the mandrel, near its lower end, between twocol-lars a and b is a yoke 19, carrying at each end a pointed rod 21,which passes through saidyoke and is provided with a spiral spring20,which bearsagainst the lower side of the yoke and the upper side of acollar o on said rod. These springs keep the pointed rods presseddownward upon the work which is to be operated upon with sufIicientforce to carry the oscillating or swinging The mandrel is provided witha chuck 18 at its lower end to hold the boring-tool. i

The numeral 29 indicates a rod journaled at one end in a lug 32 on thebracket and at the other end secured to a lug on the oscillating frame,'the rod being provided with a surrounding spiral spring 31, securedbetween the respective lugs. This spring serves to hold the oscillatingframe and drill to its Work and to return said frame to normal positionafter the work is finished.

The stock to be operated upon is indicated by the numeral 30 and isshown in proper position for the action of the boring-tool, (indicatedby the numeral 22.)

The oscillating or swinging frame 11 is formed with a bifurcated lowerextremity 29, which straddles a rigidlyfixed transverse shaft 31,mounted in ears 32 on the frame 12, between one of which ears and thebifurcated extremity 29 a spiral spring 33 is interposed for Ithepurpose of returning the frameto its normal position after the work haspassedbeneath the boring-tool.

The operation of the machine is as follows: Motion being imparted to themandrel, the

IOO

Worm 1G and gear-wheel 15 impart motion to the cams 13, which in theirrotation press upon lthe rollers 25 and force back the lower end of thearms 10, which cause the shaft 9 to turn in its bearings and forcedownward the outer end of the levers 8, which in turn, being connectedto collar 7, force down the mandrel and with it, by means of the yoke19, the pointed rods 21. The downward movement of the rods is stopped bycontact with the Work; but the downward movement of the mandrelcontinues, compressing the springs 2O and 3, the rods in the meantimebeing caused to move by the work into the position shown by the dottedlines in Fig. 2. When the cams 13 have made a complete revolution, therollers will drop into the depressions of the cams, permitting thelevers 8 to rise, and the spring 3, being relieved of its tension, willforce the mandrel back to its normal position, the oscillating framebeing swung back to its normal position by the spring 3l.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

l. In a floor-boring machine, the combination of an oscillating frame, arevolving mand rel provided with a worm intermeshing with a gear-wheelkeyed on a shaft carrying cams, arms mounted on a rock-shaft andoperated by said cams, levers keyed to the rock-shaft and having theirends connected to a collar on the mandrel, and a spring for returningsaid mandrel to norm al position,substantially as specified.

2. The combination, in a iioor-boring machine, of an oscillating frame,a revolving mandrel mounted in bearings in said frame, a worm featheredon the mandrel,an intel-meshing gear-wheel, the arms providedWithfriction -rollers bearing against the cams and mounted upon arock-shaft, and the arms keyed to said shaft and provided with slottedends engaging a collar on the mandrel, whereby said mandrel is -movedlongitudinally to advance the boring-tool to its work, substantially asspecified. 3. In a door-boring machine, the combination with theoscillating frame and the rotatable mandrel jonrnaled therein, ofmechanism substantially as described for forcing the maud rel down toits work, a yoke secured on the mandrel and carrying spring-pressedrods, a spring for holding the mandrel in normal p0- sition andreturning it to such position, and a collar for limiting the upwardmovement of said mandrel, substantially as specified.

.FRANK B. HOOKER.

Vitnesses:

O. W. ORCUTT, RALPH HOOKER.

